CN219660296U - EMC shielding cover and circuit board mounting structure - Google Patents

Abstract

The utility model discloses an EMC shielding case, comprising: a first portion having a top wall and a first sidewall disposed circumferentially, the first sidewall including a plurality of securing units; a second part matched with the first part, wherein the second part is provided with a bottom wall and a second side wall arranged along the circumferential direction, and the second side wall comprises a plurality of limiting units corresponding to the fixing units; the first part and the second part are respectively arranged at two sides of the circuit board along the first direction, and the fixing unit and the limiting unit are arranged on the circuit board in a matched mode so that the first part and the second part are spliced together to form the shielding cover; when the first part and the second part are spliced together to form the shielding cover, the fixing unit is accommodated in the limiting unit, and the limiting unit is used for limiting the fixing unit to move relative to the circuit board. The utility model can lead the shielding range of the EMC shielding cover to be more flexible, the cost to be lower, the production efficiency to be higher, and the actual use process to be more reliable. The utility model also provides a circuit board mounting structure.

Description

EMC shielding cover and circuit board mounting structure

Technical Field

The utility model relates to the technical field of electromagnetic shielding, in particular to an EMC shielding cover and a circuit board mounting structure.

Background

In the current hardware design of electronic controllers, products which are easy to generate electromagnetic interference, such as high-speed chips, application interface filter circuits, high-power circuits and the like, are often required to be used, and electromagnetic compatibility (Electro-Magnetic Compatibility, EMC) of the electronic controllers needs to be considered. Therefore, EMC protection structures are arranged in the electronic controller. The current common way is to use SMT to solder the shield to the circuit board in a fixed manner; alternatively, a two-part removable shield clip (shield mount soldered to the circuit board) and shield is used. The two EMC protection structures are arranged on the circuit board; alternatively, the EMC protection structure is fixed to the electronic controller housing of the integrated circuit board by means of fasteners.

However, both of the above approaches require the circuit board to meet solderability requirements and add additional sub-parts, thereby increasing cost and complexity of the SMT process. And in practical applications of automotive electronic controllers, the soldering reliability of SMT processes cannot meet the limitations of higher shield vibration and shock. In addition, EMC protective structure passes through the scheme of fastener fixed on the electronic controller casing of integrated circuit board, has still increased electronic controller casing and design degree of difficulty and parts cost for the inside spatial layout of electronic controller becomes complicated.

Disclosure of Invention

The utility model aims to solve the problems of complex installation mode and high cost of an EMC shielding case. The utility model provides an EMC shielding cover and a circuit board mounting structure, which can ensure that when an EMC protection structure is arranged in an automobile electronic controller, the controller space is more compact, the shielding range is more flexible, the cost is lower, the production efficiency is higher, and the actual use process is more reliable.

To solve the above technical problems, an embodiment of the present utility model discloses an EMC shielding case, including: a first portion having a top wall and a first sidewall disposed circumferentially, the first sidewall comprising a plurality of securing units; a second portion mated with the first portion, the second portion having a bottom wall and a second side wall disposed along the circumferential direction, the second side wall including a plurality of stopper units corresponding to the fixing units; the first part and the second part are respectively arranged at two sides of the circuit board along the first direction, and the fixing unit and the limiting unit are arranged on the circuit board in a matched mode, so that the first part and the second part are spliced together to form the shielding cover; when the first part and the second part are spliced together to form the shielding cover, the fixing unit is accommodated in the limiting unit, and the limiting unit is used for limiting the fixing unit to move relative to the circuit board.

By adopting the technical scheme, the shielding cover with the local cladding can be formed, the position layout on the circuit board is more flexible, the space of the electronic controller is more compact, the number of corresponding parts is reduced, the cost of the corresponding parts is reduced, and the production is simpler, more convenient and more reliable.

According to another embodiment of the present utility model, an EMC shield is disclosed, wherein the first sidewall further includes a plurality of first extending sections spaced apart along the circumferential direction, each of the first extending sections being provided with one of the fixing units; the second side wall further comprises a plurality of second extending sections which are arranged at intervals along the circumferential direction, and each second extending section is provided with one limiting unit; along the first direction, the fixing unit is matched with the limiting unit, so that the first extension section and the second extension section are fixedly arranged on the circuit board.

According to another embodiment of the present utility model, an EMC shield is disclosed wherein the securing element is a protrusion extending in the first direction, and wherein the securing element is coupled to the spacing element in the first direction through a hole in the circuit board.

According to another embodiment of the present utility model, an EMC shield is disclosed, wherein the limiting unit is a through-hole extending in the first direction, and the protrusion is inserted into the through-hole.

According to another embodiment of the present utility model, an EMC shield is disclosed, wherein the first sidewall further includes a first rim disposed between the first sidewall and the first extension, the first rim extending in the circumferential direction; the second side wall further comprises a second edge, the second edge is arranged between the second side wall and the second extension section, and the second edge extends along the circumferential direction; when the first part and the second part are spliced together to form the shielding cover, the first edge and the second edge are respectively attached to two sides of the circuit board in the first direction.

According to another embodiment of the present utility model, an EMC shield is disclosed, wherein the number of the through holes includes four, and the four through holes are symmetrically arranged in the circumferential direction of the second portion in pairs; the number of the protrusions comprises four, and the protrusions correspond to the four through holes respectively.

According to another embodiment of the present utility model, an EMC shield is disclosed in which the protrusion is rivet-fitted with the through-hole such that the first portion and the second portion are fixedly disposed on both sides of the circuit board, respectively.

According to another embodiment of the present utility model, an EMC shield is disclosed, wherein the securing unit is integrally formed with the first extension.

According to another embodiment of the present utility model, an EMC shield is disclosed, wherein the first portion and the second portion are made of metal.

The embodiment of the utility model also discloses a circuit board mounting structure, which comprises: EMC shields as described; and the EMC shielding cover is pressed on the circuit board in a riveting fit mode.

By adopting the technical scheme, when the EMC protection structure is arranged in the automobile electronic controller, the controller space is more compact, the shielding range is more flexible, the cost is lower, the production efficiency is higher, and the actual use process is more reliable.

Drawings

Fig. 1 shows a perspective view of an EMC shield of an embodiment of the utility model.

Fig. 2 shows a perspective view of a first portion of an EMC shield of an embodiment of the utility model.

Fig. 3 shows a perspective view of a second portion of an EMC shield of an embodiment of the utility model.

Fig. 4 shows a cross-sectional view of an EMC shield of an embodiment of the utility model.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the utility model described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the inventive product is conventionally put in use, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the present utility model provides an EMC shield 1 comprising: a first portion 11 and a second portion 12 cooperating with the first portion 11.

Wherein, referring to fig. 2, the first portion 11 has a top wall 111 and a first side wall 112 disposed circumferentially (as indicated by the R direction in fig. 1). Further, referring to fig. 3, the second portion 12 has a bottom wall 121 and a second side wall 122 disposed along a circumferential direction (as shown in the R direction in fig. 3), and with continued reference to fig. 1, the second portion 12 and the first portion 11 are symmetrically disposed along the first direction (as shown in the Z direction in fig. 1) on both upper and lower sides of the circuit board 2. Illustratively, the first portion 11 and the second portion 12 are metal.

Referring to fig. 2 and 3 in combination with fig. 1, in an embodiment of the present utility model, the first portion 11 and the second portion 12 are two square caps, the first sidewall 112 extends obliquely in a first direction (as shown in the Z direction in fig. 1), and the second sidewall 122 extends obliquely in the first direction (as shown in the Z direction in fig. 3). The top wall 111 and the bottom wall 121 are two square plates with the same shape, and the joints of the first side wall 112, the top wall 111, the second side wall 122 and the bottom wall 121 are rounded.

It should be noted that, the specific shape of the first portion 11 and the second portion 12 is not limited in particular, and may be selected according to practical situations, for example: the first and second portions 11 and 12 may be circular structures, or the first and second portions 11 and 12 may be hemispherical structures.

With continued reference to fig. 2 and 3, the first side wall 112 includes a plurality of fixing units 31, and the second side wall 122 includes a plurality of limiting units 32 corresponding to the fixing units 31, and the limiting units 32 are configured to cooperate with the corresponding fixing units 31 to limit radial movement (as shown in the Y direction in fig. 2) of the fixing units 31 relative to the limiting units 32.

Specifically, referring to fig. 4 in combination with fig. 1, in a first direction (as shown in a Z direction in fig. 4), the first portion 11 and the second portion 12 are provided on upper and lower sides of the circuit board 2, respectively. And, the fixing unit 31 provided on the first side wall 112 and the limiting unit 32 provided on the second side wall 122 are configured to be provided on the circuit board 2 in a mating manner. That is, the fixing unit 31 is engaged with the limiting unit 32 located at the other side of the circuit board 2 after passing through a predetermined hole of the circuit board 2 from one side of the circuit board 2, so that the fixing unit 31 and the limiting unit 32 are fixedly connected with the circuit board 2.

In addition, since the fixing unit 31 is disposed on the first side wall 112, the limiting unit 32 is disposed on the second side wall 122, the first side wall 112 is disposed along the circumference of the top wall 111 of the first portion 11, the second side wall 122 is disposed along the circumference of the bottom wall 121 of the second portion 12, and when the fixing unit 31 and the limiting unit 32 are matched, that is, the fixing unit 31 is accommodated in the limiting unit 32, the first side wall 112 and the second side wall 122 are fixedly connected with the circuit board 2 respectively.

Thus, when the first portion 11 and the second portion 12 are co-joined to form the shield, the limiting unit 32 can be used to limit the movement of the fixing unit 31 relative to the circuit board 2, so as to limit the movement of the first portion 11 and the second portion 12 relative to the circuit board 2 in the radial direction (as shown in the Y direction in fig. 4) of the limiting unit 32.

The EMC shielding cover is arranged to be a first part 11 and a second part 12 which are mutually corresponding, and the first part 11 and the second part 12 are buckled on the circuit board 2 along a first direction through a fixing unit 31 arranged on a first side wall 112 of the first part 11 and a limiting unit 32 arranged on a second side wall 122 of the second part 12. Compared with the existing technology of welding or arranging the EMC shielding cover on the circuit board 2 by using a shielding cover clip and the like, the shielding effect of the first part 11 and the second part 12 which correspond to each other is more flexible locally and the cost of parts is lower.

Therefore, the first part 11 and the second part 12 are matched with each other to form the local cladding type EMC shielding cover, the position layout on the circuit board is more flexible, the space of the electronic controller is more compact, the number of corresponding parts is reduced, the cost of the corresponding parts is reduced, and the production is simpler, more convenient and more reliable.

In some possible embodiments, referring to fig. 1 in combination with fig. 2, the first sidewall 112 further includes a plurality of first extension segments 1121 circumferentially (as indicated by R direction in fig. 1) spaced apart, and each of the first extension segments 1121 is provided with a fixing unit 31.

Illustratively, the number of the first extending sections 1121 is four, so the number of the fixing units 31 correspondingly disposed on the first extending sections 1121 is four, the four first extending sections 1121 are disposed at intervals along the circumference of the top wall 111, and the connection portions of the first extending sections 1121 and the first side walls 112 are rounded.

Referring to fig. 3, the second side wall 122 further includes a plurality of second extending sections 1221 disposed at intervals along a circumferential direction (as shown in an R direction in fig. 3), and each of the second extending sections 1221 is provided with a limiting unit 32.

The number of the second extending sections 1221 is four, and therefore, the number of the limiting units 32 correspondingly disposed on the second extending sections 1221 is four, and the four second extending sections 1221 are disposed at intervals along the circumferential direction of the top wall 121, and the connection portions between the second extending sections 1221 and the second side walls 122 are rounded.

With continued reference to fig. 4, along the first direction (as shown in the Z direction in fig. 4), the fixing unit 31 is mated with the limiting unit 32, so that the first extension 1121 and the second extension 1221 are fixedly disposed on the circuit board 2. Specifically, the fixing unit 31 and the limiting unit 32 are connected to each other in a matched manner, and since the fixing unit 31 is disposed on the first extension section 1121 and the limiting unit 32 is disposed on the second extension section 1221, the first extension section 1121 and the second extension section 1221 are fixed to the circuit board 2 in a press-fit manner. Illustratively, the first extension 1121 and the second extension 1221 are disposed parallel to the circuit board 2 along a first direction.

In some possible embodiments, the fixing unit 31 is connected to the limiting unit 32 through a hole in the circuit board 2 in the first direction. Illustratively, referring to fig. 4, the fixing unit 31 is a protrusion extending in the first direction. The stopper unit 32 is a through hole extending in the first direction. When the first portion 11 and the second portion 12 are combined together to form the shield, the protrusion is inserted into the through hole, and the protrusion is connected with the through hole, i.e., the fixing unit 31 is connected with the limiting unit 32.

In some possible embodiments, referring to fig. 2 and 3 in combination with fig. 4, the number of the fixing units 31 includes four, and the fixing units 31 are disposed at intervals in the circumferential direction (as indicated by the R direction in fig. 2). The number of the limiting units 32 includes four, and the limiting units 32 are arranged at intervals along the circumferential direction (as shown in the R direction in fig. 3), and illustratively, referring to fig. 3, the limiting units 32 are symmetrically arranged in pairs in the circumferential direction of the second portion 12. The top wall 111 of the first portion 11 and the second side wall 122 of the second portion 12 are located between two symmetrically arranged limiting units 32, and a fixing unit 31 is arranged in each limiting unit 32.

The fixing unit 31 is in riveting fit with the limiting unit 32, so that the first part 11 and the second part 12 are respectively and fixedly arranged on two sides of the circuit board 2. Riveting is a permanent fixing technique. The other components (i.e., the limiting unit 32 and the circuit board 2) are fixed together by self-generated deformation under pressure of the caulking apparatus by using a metal pin (i.e., the fixing unit 31) called a rivet. Illustratively, the securing unit 31 is integrally formed with the first extension 1121.

In some possible embodiments, referring to fig. 1 and 3 in combination with fig. 4, the first sidewall 112 further includes a first edge 1122, the first edge 1122 being disposed between the first sidewall 112 and the first extension 1121, the first edge 1122 extending in a circumferential direction (as indicated by the R direction in fig. 1). The second sidewall 122 further includes a second rim 1222, the second rim 1222 being disposed between the second sidewall 122 and the second extension 1221, the second rim 1222 extending in a circumferential direction (as indicated by the R direction in fig. 1). Illustratively, referring to fig. 4, when the first portion 11 and the second portion 12 are co-joined to form a shield, the first edge 1122 and the second edge 1222 are respectively attached to two sides of the circuit board 2 in a first direction (as shown in the Z-direction in fig. 4).

In another embodiment, the present utility model provides a circuit board 2 mounting structure, comprising: a circuit board 2 and an EMC shield 1 as described in any of the embodiments above. Specifically, the EMC shield 1 is composed of a first portion 11 and a second portion 12, and the first portion 11 and the second portion 12 are respectively spliced together on the upper side and the lower side of the circuit board 2 along the first direction to form the EMC shield 1, so that the EMC shield 1 is pressed on the circuit board 2 in a riveting fit manner.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. An EMC shield, comprising:

a first portion having a top wall and a first sidewall disposed circumferentially, the first sidewall comprising a plurality of securing units;

a second portion mated with the first portion, the second portion having a bottom wall and a second side wall disposed along the circumferential direction, the second side wall including a plurality of stopper units corresponding to the fixing units;

the first part and the second part are respectively arranged at two sides of the circuit board along the first direction, and the fixing unit and the limiting unit are arranged on the circuit board in a matched mode, so that the first part and the second part are spliced together to form the shielding cover;

when the first part and the second part are spliced together to form the shielding cover, the fixing unit is accommodated in the limiting unit, and the limiting unit is used for limiting the fixing unit to move relative to the circuit board.

2. The EMC shield of claim 1, wherein the first sidewall further includes a plurality of first extension segments spaced apart along the perimeter, each of the first extension segments being provided with one of the securing units;

the second side wall further comprises a plurality of second extending sections which are arranged at intervals along the circumferential direction, and each second extending section is provided with one limiting unit;

along the first direction, the fixing unit is matched with the limiting unit, so that the first extension section and the second extension section are fixedly arranged on the circuit board.

3. The EMC shield of claim 2, wherein the securing unit is a protrusion that extends in the first direction, the securing unit being connected to the spacing unit through an aperture in the circuit board in the first direction.

4. The EMC shield of claim 3, wherein the limit unit is a through-hole extending in the first direction, the protrusion being inserted into the through-hole.

5. The EMC shield of claim 2, wherein the first sidewall further includes a first rim disposed between the first sidewall and the first extension, the first rim extending in the circumferential direction;

the second side wall further comprises a second edge, the second edge is arranged between the second side wall and the second extension section, and the second edge extends along the circumferential direction;

when the first part and the second part are spliced together to form the shielding cover, the first edge and the second edge are respectively attached to two sides of the circuit board in the first direction.

6. The EMC shield of claim 4, wherein the number of through holes includes four, two by two symmetrically disposed in a circumferential direction of the second portion; the number of the protrusions comprises four, and the protrusions correspond to the four through holes respectively.

7. The EMC shield of claim 6, wherein the protrusion is staked with the through-hole such that the first portion and the second portion are fixedly disposed on opposite sides of the circuit board, respectively.

8. The EMC shield of claim 2, wherein the securing unit is integrally formed with the first extension.

9. The EMC shield of any one of claims 1-8, wherein the material of the first portion and the second portion is metal.

10. A circuit board mounting structure, comprising:

the EMC shield of any one of claims 1-9;

and the EMC shielding cover is pressed on the circuit board in a riveting fit mode.